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ESTACION DE PACKET RADIO - BUENOS AIRES (GF05OM)
BOLETINES INFORMATIVOS PROGRAMADOS (BIP)
SLACKWARE LINUX - HELLOCODELINUX@GMAIL.COM

+----------------------------------------------------------------------------+ Title : rtl-sdr.com

Title : SDR-Makerspace Talk: Evaluation of SDR boards and toolchains

Content : The  Software Defined Radio Academy  YouTube
channel recently uploaded an interesting talk by Alex Csete
(creator of the popular GQRX and GPredict applications), and
Sheila Christiansen. Their presentation discusses their work with
the European Space Agency (ESA), Libre Space Foundation and how
they are running SDR Makerspace's that are helping students create
and track cubesats. During the talk Alex and Sheila also describe
various SDR hardware, and how they test them for their purposes.

Title : A Demonstration of RSPDuo Diversity Being used to Cancel
Local Interference

Content : SDRPlay have recently published a video demonstrating
how the new RSPduo diversity feature in SDRUno can be used to
cancel local interference.  The SDRplay RSPDuo is a 14-bit dual
tuner software defined radio capable of tuning between 1 kHz - 2
GHz. It's defining feature is that it has two receivers in one radio,
which should allow for interesting phase coherent applications such
as diversity. The RSPDuo's diversity feature allows us to either
combine two antenna signals together for an up to 3 dB increase, or
for removal of an unwanted noise source via subtraction of signals.

Title : Weather Satellite NOAA 15 Appears to have Failed (Again)

Content : Back in April 2018 we posted how the NOAA-15 APT
weather satellite that many RTL-SDR users enjoy receiving images
from was having problems with it's scan motor resulting in image
errors. The satellite recovered from that problem, but today the
problem appears to be back and in a much worse way now.

Title : Atomic Radio: Quantum Laser Based Radio Reception

Content : Software defined radio (SDR) is a relatively new
technology that has impacted the world of radio technology in many
ways. But beyond SDR, there are still some other very interesting
radio technologies being worked on, such as "Atomic Radio" a.k.a
"Quantum Radio".

Title : Slow Scan Moon Bounce Event for 50th Anniversary of the
Moon landing

Content : Fifty years ago Neil Armstrong became the first man
to step foot on the moon. This weekend on June 20th and 21st 2019
Amateur Radio operators at the [ PI9CAM ] team have been transmitting
Slow-Scan Television images in commemoration of this historic event
at the Dwingeloo radio astronomy station in the Netherlands. This
station is the oldest rotatable 25-meter radio telescope in the
world. 

Title : Weather Satellite Meteor M2-2 Now Transmitting Images

Content : Reports from Reddit and Twitter are in that the recently
launched Meteor M2-2 weather satellite is now functional and
broadcasting images at 137.9 MHz. A few people have noted that the
reception quality appears to be better than the older satellite.

Title : PICTOR: An Open Source Low Cost Radio Telescope based
on RTL-SDR

Content : PICTOR is an open source and open hardware radio
telescope that aims to promote radio astronomy on a budget. It
consists of a 1.5 meter parabolic dish antenna, 1420 MHz feedhorn, a
two stage low noise amplifier (LNA), high pass filter, and from what
we gather, an RTL-SDR. Future designs may also use higher bandwidth
SDRs. Currently there doesn't seem to be much information about the
build and exact components used in their design, but we're hoping
that those details will come in time.

Title : A Low Cost 2.4 GHz Downconverter from off the Shelf Dev
Boards

Content : Over on GitHub Ian Wraith has released his design and microcontroller code for a low cost 2.4 GHz downconverter circuit
. A downconverter is a hardware device that shifts the signals that
it receives into a lower frequency band. This is useful in the case
of RTL-SDRs and Airspy SDRs, as their maximum frequency range is
only 1.7 GHz. Ian's 2.4 GHz downconverter reduces those 2.4 GHz
signals down to 1 GHz, which can then be received with his Airspy.


+----------------------------------------------------------------------------+

"By necessity, by proclivity, and by delight, we all quote. In fact,
it is as difficult to appropriate the thoughts of others as it is to
invent. (R. Emerson)"
-- Quoted from a fortune cookie program
(whose author claims, "Actually, stealing IS easier.")
[to which I reply, "You think it's easy for me to
misconstrue all these misquotations?!?"]

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